Tannic Acid
Gallotannic Acid
- CAS
- 8016-84-0
- EC
- 294-862-7
- Sectors
- Food & Nutrition, Pharma & Healthcare, Textiles, Leather & Paper
Tannic Acid (CAS 8016-84-0), also known as gallotannic acid, is a tannin obtained from plant galls and supplied as a light yellow to tan amorphous powder, used as a flavoring and clarifying agent in food and beverages, as an astringent in pharmaceuticals, and in leather tanning, dyes and inks. It has a weak acidic taste, soluble in water (forming astringent solutions), alcohols, and glycerol, insoluble in hydrocarbons. Hygroscopic, decomposes above 200°C; extracted from plant galls or synthesized.
Tannic Acid
Applications
Used in food as a flavoring agent, clarifying agent in wine/beer, and sequestrant; in pharmaceuticals as an astringent and antidiarrheal; in tanning leather, dyes, and inks; in cosmetics for skin protection; and in water treatment for purification.
Safety & Risks
Irritates eyes, skin, and mucous membranes; may cause respiratory issues if inhaled. Low acute toxicity but prolonged exposure leads to tissue damage; avoid strong oxidizers. Stable under ambient but light-sensitive; Hazard Class not specified, use PPE and ventilation.
Packaging
In 25kg fiber drums or bags with liners; store in cool, dry, ventilated areas away from light.